Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules
We report experimental results of the active switching of electromagnetically induced transparency (EIT) analogue by controlling the dark mode excitation pathways in a microelectromechanical system based tri-atomic metamolecule, operating in the terahertz spectral region. The tri-atomic metamolecule...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2017
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| Online Access: | https://hdl.handle.net/10356/84730 http://hdl.handle.net/10220/41966 |
| _version_ | 1826119283262881792 |
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| author | Pitchappa, Prakash Manjappa, Manukumara Ho, Chong Pei Singh, Ranjan Singh, Navab Lee, Chengkuo |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Pitchappa, Prakash Manjappa, Manukumara Ho, Chong Pei Singh, Ranjan Singh, Navab Lee, Chengkuo |
| author_sort | Pitchappa, Prakash |
| collection | NTU |
| description | We report experimental results of the active switching of electromagnetically induced transparency (EIT) analogue by controlling the dark mode excitation pathways in a microelectromechanical system based tri-atomic metamolecule, operating in the terahertz spectral region. The tri-atomic metamolecule consists of two bright cut wire resonators (CWRs) on either side of the dark split ring resonators (SRRs). Each of the CWRs can independently excite the dark inductive-capacitive resonance mode of the SRRs through inductive coupling, and this allows for the dual pathways of dark mode excitation. The CWRs are made movable along the out-of-plane direction and electrically isolated to achieve selective reconfiguration. Hence, by controlling the physical position of these CWRs, the excitation pathways can be actively reconfigured. This enables the strong excitation of EIT analogue at 0.65 THz, only when one of the pathways is made accessible. Moreover, the transparency peak is completely modulated when both pathways are made either inaccessible or equally accessible. The proposed approach of realizing independent control of constituent resonators in a multi-resonator coupled system, enables the realization of efficient slow light devices and tunable high-Q resonators in terahertz spectral region. |
| first_indexed | 2024-10-01T04:57:42Z |
| format | Journal Article |
| id | ntu-10356/84730 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:57:42Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/847302023-02-28T19:33:36Z Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules Pitchappa, Prakash Manjappa, Manukumara Ho, Chong Pei Singh, Ranjan Singh, Navab Lee, Chengkuo School of Physical and Mathematical Sciences Metamaterials Coupled resonators We report experimental results of the active switching of electromagnetically induced transparency (EIT) analogue by controlling the dark mode excitation pathways in a microelectromechanical system based tri-atomic metamolecule, operating in the terahertz spectral region. The tri-atomic metamolecule consists of two bright cut wire resonators (CWRs) on either side of the dark split ring resonators (SRRs). Each of the CWRs can independently excite the dark inductive-capacitive resonance mode of the SRRs through inductive coupling, and this allows for the dual pathways of dark mode excitation. The CWRs are made movable along the out-of-plane direction and electrically isolated to achieve selective reconfiguration. Hence, by controlling the physical position of these CWRs, the excitation pathways can be actively reconfigured. This enables the strong excitation of EIT analogue at 0.65 THz, only when one of the pathways is made accessible. Moreover, the transparency peak is completely modulated when both pathways are made either inaccessible or equally accessible. The proposed approach of realizing independent control of constituent resonators in a multi-resonator coupled system, enables the realization of efficient slow light devices and tunable high-Q resonators in terahertz spectral region. NRF (Natl Research Foundation, S’pore) Published version 2017-01-03T02:57:08Z 2019-12-06T15:50:25Z 2017-01-03T02:57:08Z 2019-12-06T15:50:25Z 2016 Journal Article Pitchappa, P., Manjappa, M., Ho, C. P., Singh, R., Singh, N., & Lee, C. (2016). Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules. Applied Physics Letters, 109(21), 211103-. 0003-6951 https://hdl.handle.net/10356/84730 http://hdl.handle.net/10220/41966 10.1063/1.4969061 en Applied Physics Letters © 2016 American Institute of Physics (AIP) Publishing. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing. The published version is available at: [http://dx.doi.org/10.1063/1.4969061]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | Metamaterials Coupled resonators Pitchappa, Prakash Manjappa, Manukumara Ho, Chong Pei Singh, Ranjan Singh, Navab Lee, Chengkuo Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules |
| title | Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules |
| title_full | Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules |
| title_fullStr | Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules |
| title_full_unstemmed | Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules |
| title_short | Active control of electromagnetically induced transparency with dual dark mode excitation pathways using MEMS based tri-atomic metamolecules |
| title_sort | active control of electromagnetically induced transparency with dual dark mode excitation pathways using mems based tri atomic metamolecules |
| topic | Metamaterials Coupled resonators |
| url | https://hdl.handle.net/10356/84730 http://hdl.handle.net/10220/41966 |
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